论文期刊

Synthesis of gold nanostars with fractal structure: the application in surface-enhanced Raman scattering




作者: Jian Zhu*, Mei-Jin Liu, Jian-Jun Li, Xin Li, Jun-Wu Zhao*
发表/完成日期: 2017-11-20
期刊名称: European Physical Journal B
期卷: 90
相关文章:
论文简介
Abstract. Multi-branched gold nanostars with fractal feature were synthesized using the Triton X-100
participant seed-growth method. By increasing the amount of ascorbic acid, the branch length of gold
nanostars could be greatly increased. It has been interesting to nd that the secondary growth of new
branches takes place from the elementary structure when the aspect ratio of the branches is greater than
8.0 and the corresponding plasmon absorption wavelength is greater than 900 nm. Raman activity of the
gold nanostar lms has been investigated by using the 4-mercaptobenzoic acid (4-MBA) as Raman active
probe. Experimental results show that the surface-enhanced Raman scattering (SERS) ability of the gold
nanostars could be eciently improved when the fractal structure appears. The physical mechanism has
been attributed to the intense increased secondary branch number and the increased hot spots'. These
unique multi-branched gold nanostars with fractal feature and great SERS activity should have great
potential in sensing applications.